First thing is to measure the layout of parking building
where this system will be implemented, Bina Nusantara
University Anggrek Campus. Second, measure the minimum
and maximum range that can be measured by HC-SR04
ultrasonic sensor. Third, determine the safe distance between
sensors to avoid interference. Fourth, specify the design’s
uniqueness, what make this system different with the system
existed. Lastly, measure the update time from sensor controller
to master controller (PC).